I'm the one who originally started this post and did wind up getting a WildFire bike. I think I was mainly attracted to the picture; it does look kind of cool. But I will tell this - I would not recommend it. I wound up having to re-build the whole thing, it was not very well put together. If you want something assembled, just get a moped.
Recently I put a 80 cc engine in and replaced the whole kit. I will say the frame itself is good. I replaced tires at the outset with kevlar, tires blew out within a week after receiving it. Had to replace throttle, their switch throttle is no good. Bicycle chain and motor chain tend to work against each other, one or other slips.
All in all, I probably spent several hundred dollars beyond the original price just to fix it right. You'd do better getting a good bicycle then put motor on. I don't think I like gas engines - next time around I'm going electric! (Waiting for Lithium Ion batteries to come down in price.)